Actual source code: test19.c
slepc-3.22.1 2024-10-28
1: /*
2: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
3: SLEPc - Scalable Library for Eigenvalue Problem Computations
4: Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain
6: This file is part of SLEPc.
7: SLEPc is distributed under a 2-clause BSD license (see LICENSE).
8: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
9: */
11: static char help[] = "Test BVGetSplitRows().\n\n";
13: #include <slepcbv.h>
15: int main(int argc,char **argv)
16: {
17: Mat M,T,D,block[4];
18: Vec t,v,v1,v2,w,*C;
19: BV X,U,L;
20: IS is[2];
21: PetscInt i,j,n=10,k=5,l=3,nc=0,rstart,rend;
22: PetscViewer view;
23: PetscBool verbose;
25: PetscFunctionBeginUser;
26: PetscCall(SlepcInitialize(&argc,&argv,NULL,help));
27: PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL));
28: PetscCall(PetscOptionsGetInt(NULL,NULL,"-k",&k,NULL));
29: PetscCall(PetscOptionsGetInt(NULL,NULL,"-l",&l,NULL));
30: PetscCall(PetscOptionsGetInt(NULL,NULL,"-nc",&nc,NULL));
31: PetscCall(PetscOptionsHasName(NULL,NULL,"-verbose",&verbose));
32: PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Test BVGetSplitRows (length %" PetscInt_FMT ", l=%" PetscInt_FMT ", k=%" PetscInt_FMT ", nc=%" PetscInt_FMT ").\n",n,l,k,nc));
34: /* Create Nest matrix */
35: PetscCall(MatCreate(PETSC_COMM_WORLD,&T));
36: PetscCall(MatSetSizes(T,PETSC_DECIDE,PETSC_DECIDE,n,n));
37: PetscCall(MatSetFromOptions(T));
38: PetscCall(MatGetOwnershipRange(T,&rstart,&rend));
39: for (i=rstart;i<rend;i++) {
40: if (i>0) PetscCall(MatSetValue(T,i,i-1,-1.0,INSERT_VALUES));
41: PetscCall(MatSetValue(T,i,i,2.0,INSERT_VALUES));
42: if (i<n-1) PetscCall(MatSetValue(T,i,i+1,-1.0,INSERT_VALUES));
43: }
44: PetscCall(MatAssemblyBegin(T,MAT_FINAL_ASSEMBLY));
45: PetscCall(MatAssemblyEnd(T,MAT_FINAL_ASSEMBLY));
46: PetscCall(MatCreateConstantDiagonal(PETSC_COMM_WORLD,PETSC_DECIDE,PETSC_DECIDE,n,n,1.0,&D));
48: block[0] = T;
49: block[1] = block[2] = NULL;
50: block[3] = D;
51: PetscCall(MatCreateNest(PETSC_COMM_WORLD,2,NULL,2,NULL,block,&M));
52: PetscCall(MatDestroy(&T));
53: PetscCall(MatDestroy(&D));
54: PetscCall(MatNestGetISs(M,is,NULL));
56: PetscCall(MatView(M,NULL));
58: /* Create template vector */
59: PetscCall(MatCreateVecs(M,&t,NULL));
61: /* Create BV object X */
62: PetscCall(BVCreate(PETSC_COMM_WORLD,&X));
63: PetscCall(PetscObjectSetName((PetscObject)X,"X"));
64: PetscCall(BVSetSizesFromVec(X,t,k));
65: PetscCall(BVSetFromOptions(X));
67: /* Generate constraints and attach them to X */
68: if (nc>0) {
69: PetscCall(VecDuplicateVecs(t,nc,&C));
70: for (j=0;j<nc;j++) {
71: for (i=0;i<=j;i++) PetscCall(VecSetValue(C[j],nc-i+1,1.0,INSERT_VALUES));
72: PetscCall(VecAssemblyBegin(C[j]));
73: PetscCall(VecAssemblyEnd(C[j]));
74: }
75: PetscCall(BVInsertConstraints(X,&nc,C));
76: PetscCall(VecDestroyVecs(nc,&C));
77: }
79: /* Set up viewer */
80: PetscCall(PetscViewerASCIIGetStdout(PETSC_COMM_WORLD,&view));
81: if (verbose) PetscCall(PetscViewerPushFormat(view,PETSC_VIEWER_ASCII_MATLAB));
83: /* Fill X entries */
84: for (j=0;j<k;j++) {
85: PetscCall(BVGetColumn(X,j,&v));
86: PetscCall(VecSet(v,0.0));
87: PetscCall(VecGetSubVector(v,is[0],&v1));
88: PetscCall(VecGetSubVector(v,is[1],&v2));
89: for (i=0;i<4;i++) {
90: if (i+j>=rstart && i+j<rend) {
91: PetscCall(VecSetValue(v1,i+j,(PetscScalar)(3*i+j-2),INSERT_VALUES));
92: PetscCall(VecSetValue(v2,i+j,(PetscScalar)(-i+2*(j+1)),INSERT_VALUES));
93: }
94: }
95: PetscCall(VecAssemblyBegin(v1));
96: PetscCall(VecAssemblyBegin(v2));
97: PetscCall(VecAssemblyEnd(v1));
98: PetscCall(VecAssemblyEnd(v2));
99: PetscCall(VecRestoreSubVector(v,is[0],&v1));
100: PetscCall(VecRestoreSubVector(v,is[1],&v2));
101: PetscCall(BVRestoreColumn(X,j,&v));
102: }
103: if (verbose) PetscCall(BVView(X,view));
105: /* Get split BVs */
106: PetscCall(BVGetSplitRows(X,is[0],is[1],&U,&L));
107: PetscCall(PetscObjectSetName((PetscObject)U,"U"));
108: PetscCall(PetscObjectSetName((PetscObject)L,"L"));
110: if (verbose) {
111: PetscCall(BVView(U,view));
112: PetscCall(BVView(L,view));
113: }
115: /* Copy l-th column of U to first column of L */
116: PetscCall(BVGetColumn(U,l,&v));
117: PetscCall(BVGetColumn(L,0,&w));
118: PetscCall(VecCopy(v,w));
119: PetscCall(BVRestoreColumn(U,l,&v));
120: PetscCall(BVRestoreColumn(L,0,&w));
122: /* Finished using the split BVs */
123: PetscCall(BVRestoreSplitRows(X,is[0],is[1],&U,&L));
124: if (verbose) PetscCall(BVView(X,view));
126: /* Check: print bottom part of first column */
127: PetscCall(BVGetColumn(X,0,&v));
128: PetscCall(VecGetSubVector(v,is[1],&v2));
129: PetscCall(VecView(v2,NULL));
130: PetscCall(VecRestoreSubVector(v,is[1],&v2));
131: PetscCall(BVRestoreColumn(X,0,&v));
133: PetscCall(BVDestroy(&X));
134: PetscCall(VecDestroy(&t));
135: PetscCall(MatDestroy(&M));
136: PetscCall(SlepcFinalize());
137: return 0;
138: }
140: /*TEST
142: testset:
143: nsize: {{1 2}}
144: output_file: output/test19_1.out
145: filter: grep -v Process | grep -v Object | sed -e 's/mpi/seq/' | sed -e 's/seqcuda/seq/' | sed -e 's/seqaijcusparse/seqaij/' | sed -e 's/seqhip/seq/' | sed -e 's/seqaijhipsparse/seqaij/' | sed -e 's/nc=2/nc=0/'
146: test:
147: suffix: 1
148: args: -nc {{0 2}} -bv_type {{svec mat}}
149: test:
150: suffix: 1_cuda
151: args: -nc {{0 2}} -bv_type {{svec mat}} -mat_type aijcusparse
152: requires: cuda
153: test:
154: suffix: 1_hip
155: args: -nc {{0 2}} -bv_type {{svec mat}} -mat_type aijhipsparse
156: requires: hip
158: TEST*/